RFR: 8222107 (CSR) Support implementation-defined Map Modes

[Andrew Dinn]

Could I please get a review for the following CSR. It relates to the
change proposed in JDK-8221397 which enables FileChannel
implementation-specific extensions to enum MapMode.

  https://bugs.openjdk.java.net/browse/JDK-8222107

Thanks.

regards,


Andrew Dinn
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Senior Principal Software Engineer
Red Hat UK Ltd
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